1.)
a) Postive correlation as the number of points increases the pay increases.
b) For 10 points gained, pay increases by 45 pound.
c) Pay cant be negative when x is zero
2.) Probability
a) Probability tree
b)7%
c) Prove not independent
3.) Mean- 10.2
b) SD 3. ...
Mean with 11- Month is October
x- outlier, extreme value etc
Box 3- August
4.) Hypothesis testing:
a)0.381 and 0.00589
b) Significant and reject HO as 3.75 was less than 5%
5.) P(x=2) was 0.35 and same for P(x=4). Then was 0.15 for P(x=3) and P(x=1)
b) 0.00580 something like that
c)?
Mechanics
6) Time taken was 2 seconds to hit ground
7) Constant velocity at 24
Time taken to decelerate was 48 seconds
Total time was 264
Not reliable- ignores tractive forces and resistance to motion
8) At rest when Time is 0, 1.5 and 2.
Total distance- 33/16 metres
Not negative- prove subbing in values and anything greater than or equal to zero produces positive number.
9) T= 4/7 mg
Same accel- light string
K= 1/3
not valid- pulley modelled as smooth